Threadless bolt.



PATENTED SEPT. 18, 1906.

x. IRVIN. THREABLBSS BOLT-- APPLIOATION FILED AUG. 27, 1904.

wmmm I joint.

PATENT OFFICE.

KING IRVIN, OF MARYSVILLE, PENNSYLVANIA.

THREADLESS BO LT,

Specification of Letters Patent.

Patented Sept. 18, 1906.

- Application filed Aug s 27, 1904. Serial No. 222,419.

To all whom it may concern.-

Be it known that I, KING IRVIN, a citizen of the United States, residingat Marysville, in the county of Perry and State of Pennsylvania, haveinvented new and useful Improvements in Threadless Bolts, of which thefollowing is a specification.

This invention relates to threadless bolts.

The objects of the invention are to improve, simplify, and strengthenthe construction of suc devices.

With the foregoing objects in view the invention resides in the precisecombination and arrangement of parts and in the exact details ofconstruction hereinafter described and claimed as a practical embodimentthereof.

In the accompanying drawings, forming part of this specification, Figure1 is a transverse section through a rail-joint, showing one of theimproved nut-locks in position. Fig. 2 is a horizontal section throughthe rail- Fig. 3 is a side elevation of the bolt, showing the positionof the wedge therein. Fig. 4 is a perspective view of the improved nut.

Like reference numerals indicate corresponding parts in the differentfigures of the drawings.

The improved nut-lock comprises a bolt having an enlarged head 1 and aplain or smooth shank 2. Formed in one side of the shank 2 is a slot 3,one wall 4 of which is disposed at a right angle with respect to theaxis of the bolt, while the other wall 5 is inclined at an oblique anglewith respect to the axis of the bolt. The wall 4 of the slot preferablyis formed at the end thereof toward the en larged head 1 of the bolt, asshown in Fig. 3.

Mounted upon the smooth shank 2 of the bolt is a nut 6, having a smoothbore 7 to receive said shank. Extending through the nut 6 is a passage8, which intersects the bore 7. One wall 9 of the passage 8 is parallelwith the walls 4 of the slot 3, while the other wall 10 thereof isparallel with the wall 5, as indicated in Fig. 1. Extending through thepassage 8 of the nut 6 and through the slot 3 of the shank 2 is a wedge11, having a wall 12, parallel with the wall 4, and a wall 13, parallelwith the wall 5, said wedge being split at its small end, as shown by14.

Although it will be understood that the improved device of thisinvention is adapted for use in various connections, it has been shownfor the sake of illustration as a means for clamping together thefish-plates 16 and 17, which are shaped so as to cover the base of therail, as shown. In using the improved device the bolt is passed throughthe fishplates and railweb and the nut 6 is fitted loosely thereupon.The pointed end of the wedge is introduced into the passage 8 and slot3. It will be understood that when merely the pointed end of the wedge11 is in the slot 3 the bolt 6 may be located away from the fish-plate17. As the wedge 11 is driven home it forces the nut 6 closely againstthe lish-plate. In order to lock the device in position, it isnecessary-only to spread apart the split ends 18 19 of the wedge, asshown in Fig. 1.

It will be observed from Fig. 1 that the wedge 11 is disposed on oneside' of the shank 2. The tendency of the wedge when driven home,therefore, would be to force the small end 20 of the nut 6 against thefish-plate 17. In order to force the lower end 22 of the nut 6 withsufficient pressure against the fish-plate, said lower end is enlarged,as shown, the wall 21 thereof being beveled. Furthermore, thebearing-face 23 of the nut, which is adapted to bear against thefish-plate, is inclined slightly, as shown, from the enlarged side 22 ofthe nut toward the small side 20 thereof. By reason of this constructionwhen the wedge is driven partially home the enlarged end 22 of the nutbears first against the fishplate. As the wedgeis driven completely homesaid enlarged end 22 is forced tightly against the fish-plate.

The device of this invention is strong, simple, durable, and inexpensivein construction. Furthermore, it is adapted to be manipulated withoutdifficulty. In its particular combination and arrangement of parts andits precise details of construction it presents an improvement overprior devices intended for a similar purpose.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is

In combination, a bolt formed with a slot having walls located atdifierent angles relative to the axis of the bolt, a nut having a boleto receive the bolt and formed with an intersecting passage arranged toregister with the slot in the bolt, the angle of the walls of saidpassage relative to the axis of the nut coinciding with the angle of thewalls of the slot, said nut being enlarged at one side of the bore andformed with an inclined terminal E In testimony whereof I affix mysignature face, and a wedge having side walls coincidin presence of twowitnesses. ing with the incline of the Walls of the slot and passage,said wedge being adapted to be KING IRVIN' driven through theregistering slot and pas- Witnesses: sage, and means for securing thewedge D. E. WERT,

against accidental displacement. HARRY MONTGOMERY.

